The RenderLinkTitle
property is a boolean and not a string so what you're trying won't work.
If you used {%DocumentName%}
it would only render the current document's name because it doesn't iterate through all of the documents like the list menu is. So I don't believe this will work like you want it to, if it was a string property.
Lastly, I believe this renders the current pages name for the <a>
tags title
attribute, if checked. Have you tried checking the box and see what renders?